Tuyere for shaft furnaces



12, 1935. J. STOECKER 1,994,115

TUYERE FOR SHAFT FURNACES Filed July 5, 1933 Patented Mar. 12, 1935 mapSTATES PATENT OFFICE TUYERE ron SHAFT FURNACES seldorf, GermanyApplication July 3, 1933, Serial No. 678,954 In Germany July I, 1932 1Claim.

This invention relates to a tuyre for shaft furnaces.

It is known to employ for the regulation of the nozzle section in theblast pipes of shaft furnaces 5 rotatable nozzles which, for thispurpose, have an oval or star-shaped outlet opening. It is further knownto use nozzles having an orifice displaced relative to the longitudinalaxis.

The invention proposes a tuyere for shaft furnaces, in which the openingof the nozzle is displaced relative to the longitudinal axis and thedirection of the blast can be varied owing to the fact that the nozzleis rotatable about its axis.

The advantages afforded by the invention are that during prolongedstopping of furnaces due to reductions in output obstructions which arefrequently formed to the left and right of the tuyere as well as aboveit and which have to be removed by melting to insure satisfactoryoperation of the tuyeres can be eliminated by melting by means of thenew tuyre according to requirements.

Furthermore, in order to prevent the breaking out of tap holes,especially in case of larger outputs, it is necessary to plug one orsometimes two of the tuyeres disposed laterally to the tap hole, whichhas an unfavorable effect upon the working of the furnace. The inventionmakes it possible to deflectthe blast from the tap hole by turning thetuyeres to the right or left and thus to protect it against damage.Moreover, merely by turning the tuyere and thus deflecting the blastupwardly narrowing of the bosh is elim- 5 inated.

By way of example, the invention is illustrated in the accompanyingdrawing, in which Figures 1, 2 and 3 are views of different embodimentsof the invention. 0

Referring to Figs. 1 and 2, 1 is a tuyere of standard type which in itsupper half possesses a wedge-like insertion 2 capable of being coveredby the cooling water of the tuyere.

In the constructional form shown in Fig. 3 the 15 lower inner nozzleplate 3 is bent so as to impart to the tuyere a form resembling an elbowpart.

I claim:--

A tuyere for shaft furnaces, especially blast furnaces, consistingsubstantially of a double- 20 walled nozzle the center of the opening ofwhich is displaced relative to the longitudinal axis of the nozzle whilethe nozzle itself is rotatable about its axis so that the blastdirection may be varied, the inner wall of the nozzle projecting 25inwardly at the opening in a wedge-like shape.

JULIUS STOECKER.

